No, that is not a False widow spider (Steatoda grossa).What I see in the image is a Zygiella X-notata, commonly called the "Open sector Orb weavers".These spiders pose no threat to Human beings as with any spider found in the UK and ireland.The False widow spiders actually are not considered to pose any threat to Humans in the Arachnological community, it's all just mass Hysteria spread by the media.None of it is factual.Hope this helps you out.